臺灣博碩士論文加值系統

本研究以四硫代苯▇Qimnt(2,2''-(4,8-二▇基-4,8二氧代-[1,
2,-d:4,5,-d'']雙[1,3]二硫苯並-2,6-二塞茂)雙戊基二晴和四烷基銨溴,
利用電化學養晶法(Electrocrystallization) 以氫甲烷當溶劑製備出不
同化學組成之晶體。我們也利用了紅外線光譜,紫外-可見吸收光譜,SQUID
變溫磁感率,直流導電法,測量並探討化合物的物性。 利用紅外線光譜及
紫外-可見吸收光譜可以討論化合物有電荷轉移程度; 又紫外-可見吸收光
譜可推算Qimnt陰離子在鹽中所佔有的莫耳數; 而在SQUID變溫磁性測量得
知丁烷基銨與Qimnt之簡單鹽具有逆磁性行為;而我們晶體導電度測量,可
知所有化合物皆呈半導性質,而室溫導電度大多分佈於 負3級 到 負8級;
由X-ray單晶繞射測量結果甲烷基銨,乙烷基銨和丁烷基銨之Qimnt晶體皆
以分離堆疊方式排列及二聚體化結構。

Simple and complex alkylammonium salts of electron acceptors
Qimnt(2,2''-(4,8-dihydro-4,8-dioxo-[1,2-d:4,5-d''] -bis[1,3]
dithiolebenzo-2,6-diylidene)-bispropanedinitrile were
electrocrystallized by reaction of the electron acce- ptor with
R4NBr ( R= tetramethylammonium,tetraethylammonium
,tetrapropylammonium, tetrabutylammonium ) in acetonitrile.
Physical properties of these crystals were also measured,
including infrared spectra , ultraviolet-visible spectra ,
SQUID magnetic susceptibilities , and D C-conductivities
measurements. The crystals and molecular structure of [tet-
ramethylammonium][Qimnt]2 and [tetraethylammonium][Qimnt]2 have
been determined by the single-crystal X-ray diffraction
analysis. Both complexs are segregated stacked and dimer
structure. All the salts behave as semi-conductor,the D C-
conductivities range from -3 order to -8 order。